Punch and die press.



No. 849.881. l

G.' H. BARTLETT.

PUNGH'AND'DIB PRESS. APPLICATION FILED vINO'ST. 21, 1906 1% 3 l e 1 Imm1. c? l I WITNESSES:

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PATENTED APR. 9, 1907.

GEORGE II. BARTLETT, OF SAN FRANCISCO, CALIFORNIA.

PUNCH AND DIE PRESS.

Specification of Letters Patent.

Patented April 9, 1907.

Application led November 2l, 1906. Serial No. 344,462.

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`Be it known that I, GEORGE II. BARTLETT, a citizen of the UnitedStates, residing in the city and county of San Francisco and State.

parts of the rotary apparatus are successively brought into line withthe reciprocating mechanism.

It consists in the combination of parts and in details of constructionwhich will be more fully explained by reference to the accompanyingdrawings, in which- YFigure 1 is a side elevation, in partial section,of my apparatus. Fig. 2 is an enlarged view of disk 15.`

It is the object of my invention to provide an intermittently-rotatingmechanism having stationary intervals in conjunction with a continualreciprocating device acting in unison with the rotary device or partscarried thereby.

In the present drawings I have only shown a sufficient portion of myinvention to illustrate the novel parts.

A is a horizontal shaft turnable in journalboxes B upon a supporting-bedC. This bed is shown as having an arm 2 rising from one end, extendingforwardly, and having vertical guide 3, within which a stem orreciprocating rod 4 is slidable. This stem is connected with a lever-arm5, which is fulcrumed at 6, and the front end is connected by a-ball orsuitable joint 7 with the reciprocating stem. The

rear end of the lever is connected by rod 8 with an eccentric or crankat 9, which is mounted upon the shaft A, so that when motion istransmitted to revolve this shaft it will reciprocate the vertical stem.

The front of the shaft A has fixed to it a disk 10, from the face ofwhich projects a crank-pin 11.

y12 is a shaft ournaled out of line with the shaft A and carrying uponits front end a head 13. This head is designed to carry dies 14 uponopposite sides, and it is vdesigned to revolve this head in such amanner that each of the dies will be successively brought into line withthe vertically-moving stem, which may also carry one member of thestamping or other device, and the revoluble portion is brought to astate of rest, while the reciprocating stem is brought down to coactwith each die or part carried by the revoluble head 13. The device foreffecting this intermittent revolution of the head consists of a disk15, fixed to the inner end of the shaft 12 and having a channel milledin its face, into which channel the pin 11 of the disk 10 projects. Thechannel in the disk is milled or otherwise formed so as to form twocircular and concentric segments each having an inner outline 16 and anouter outline 17. These' segments are on a line passing transversely ofthe center of the axis of shaft A, so that the disk or device has itsgreatest diameter on this line.

Intermediate the segments the track or channel is curved inwardly towardthe center, as shown at 18, and when the shaft A and the disk 10 arerevolved the pin 11 will travel around the semicircular groove in thedisk without producing any motion of the shaft 12. Leaving the regularcurvature of the disk, the pin in its revolution contacts with the sideof the channel or depression 18 which connects the two segments and bythis contact causes the disk and its shaft to revolve until by reason ofthe eccentricity of the axes of the shaft A and 12 the pin 11 will riseout of the depression 18 and the shaft 12, and head 13 will then ceaseto revolve. The disk is then in such position that the followingsegment, into which'the pin is now entering, is concentric of the shaftA. Therefore the pin will pass around the segmental channel during ahalf-revolution of the shaft A, at the end of which when it commences torise in the latter half of its revolution it will again contact with thesides of the groove 18 of the opposite segment and by this contact againrevolves the device a half-revolution. Thus each of the die-surfaces ofthe part 13 are successively brought into line with thevertically-reciprocating stem or punch to actin unison therewith andremain stationary while the pin 11 is traveling around the circularsegment of the disk.

The head 13 is maintained in a stationary position while coacting withthe punch by a spring-pressed plunger 20, the upper end of which iscaused by the action of the spring to contact with a flattened surfaceon that part of 13 which is in line with the head of the plunger, thepressure being sufficient to retain the parts in position when desired;but when the pin 11 again acts upon the cam the spring of the plungerwill yield and allow the head 13 to again turn a half-revolution.

IOO

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Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

l. In a device for producing an intermittent revolution of a shaft withstationary periods between said revolutions, a disk mounted upon the endof the shaft, there being a channel cut in the face of the disk, saidchannel forming two circular segments with an intervening connectingportion which curves inwardly toward the axis of the shaft, a secondshaft having a crank-pin projecting into the channel of the disk, andmeans communicating a rotary motion to the `crank-shaft.

2. In a device for producing an intermittent rotary motion of a shaft,an oval disk iXed to the shaft with its major aXis intersecting theshaft, there being segmental grooves formed in each end of the disk,said grooves converging to meet on the minor axis of the disk and form acontinuous ohannel, a driving-shaft journaled out of line with theirst-narned shaft and having a crank-pin entering the groove ofthe disk,and a springpressed plunger engaging a flattened part carried by thefirst-named shaft to hold it stationary during the movements of thecrank-pin through the concentric portions of the disk-channel.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

GEORGE H. BARTLETT. Vitnesses:

FnANKLrN S. SMITH, FREDERICK E. MAYNARD.

